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Boards are important materials that are indispensable in modern life, such as blockboard, finger-jointed board, ecological board, multi-layer board, flame retardant board, etc. So what are finger-jointed boards? I think everyone is familiar with them, just like we use finger-jointed boards in our home decoration.
So what exactly is finger-jointed board made of? What are the manufacturing processes involved? How can you identify good and bad? And what are its advantages?
What is a finger joint board
Finger-jointed boards are made from multiple pieces of wood joined together without gluing or pressing the top and bottom together. The serrated joints between the vertical planks resemble the interlocking fingers of two hands, hence the name. They are used as a premium material for furniture, cabinets, wardrobes, and other applications. Finger-jointed boards are environmentally friendly, with a natural-looking texture that creates a sense of returning to nature.
Finger-jointed board production process
Step 1: The veneer passes through a professional drying machine to remove excess water, ensuring that the moisture content of the board is low and not easily deformed;
Step 2: After laying out the boards of different thicknesses, let them “cured” and wait for the glue to dry naturally, then pass through three presses to ensure that there is no delamination or debonding;
Step 3: Use four times of fixed thickness sanding to ensure the flatness of the board, and both sides can be directly pasted with natural veneer;
From raw material processing to final product shipment, the process involves: logs being cut short, split into strips, dried and modified in specialized drying equipment, sorted for color and defects, initially planed, split, joined, assembled, dried, sanded, plastered, and finally polished. Cutting wood into units of varying shapes and then reassembling them into various boards can improve certain properties of the wood, such as anisotropy, heterogeneity, and swelling and shrinkage. Boards composed of larger units have higher mechanical strength, while boards composed of smaller units exhibit greater homogeneity.
Identification method
Look at the core material growth rings: Finger-jointed boards are mostly made of fir, which has more obvious growth rings. The larger the growth rings, the older the tree is and the better the material.
Finger-jointed boards are divided into visible teeth and dark teeth. Dark teeth are the best because visible teeth are more likely to become uneven after painting. Of course, dark teeth are more difficult to process. The harder the wood, the better the board, because its deformation is much smaller and the pattern will be more beautiful.
Production Difference
Finger-jointed boards are solid wood boards, while wood panels are man-made boards. Therefore, finger-jointed boards have a natural texture, giving people a sense of returning to nature.
Whether furniture is environmentally friendly is primarily determined by its formaldehyde emissions. If the formaldehyde emissions from E0-grade finger-jointed boards and E0-grade wood panels are the same, then they are equally environmentally friendly. However, finger-jointed boards use less glue than wood panels, making them generally easier to control and more environmentally friendly. Wood panels also emit formaldehyde because they have plywood between the top and bottom (through gluing and pressing). Finger-jointed boards lack plywood, while wood panels do. Finger-jointed boards and wood panels can be distinguished visually.
How to distinguish good from bad
Look at the size of the slats
The finger-jointed strips are too broken and too small, which will affect the structural strength of the formed finger-jointed board;
Look at the core material growth rings
The smaller the annual rings of the slats used for finger-jointed boards, the older the tree is and the better the material.
Look at the teeth and tenon
Finger-jointed mortises are divided into horizontal and vertical types. Some also say they are divided into dark and visible mortises. Horizontal mortises are known as dark mortises. Because visible mortises are more prone to unevenness after painting, dark mortises are preferred. However, dark mortises are more difficult to machine.
Look at the hardness of the wood
Finger-jointed boards made of hard wood are better because they deform less easily and have more beautiful patterns. According to the above method, you can better select finger-jointed boards that meet your requirements. In decoration, finger-jointed boards are often used. They have excellent splicing strips and are environmentally friendly to E0 level.
Advantages of finger-jointed boards
Small materials for big use
Finger-jointed boards are made by removing knots, rot and other wood defects before bonding. This allows for the production of materials with fewer defects, making it possible to make good use of small materials and high-quality use of inferior materials.
Good moisture absorption and breathability
Although finger-jointed boards are spliced wood, the structure and characteristics of the wood are not changed. They still retain the natural solid wood texture and beauty, and most of them have the unique fragrance of natural wood, and have good moisture absorption and air permeability.
Physical and mechanical properties
Finger-jointed boards are superior to solid wood boards in terms of physical and mechanical properties such as tensile and compressive strength, material quality uniformity, and cracking/deformation coefficients, and their width is also larger than that of solid wood boards.
Easy to process and hold nails
Finger-jointed boards have low requirements for processing equipment, are easy to process, have good nail holding strength, and the surface can be directly painted.
Environmental protection E0 level
Finger-jointed boards are made from short pieces of solid wood and use less glue, so the environmental protection factor is relatively high. Finger-jointed boards can basically reach E0 level and are very environmentally friendly.